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Although it sounds flippant a product at this pricepoint should involve no compromises at all. I can think of several solutions, but would say that the customer should not have to fudge a solution at this level.

A great deal of frames now have larger diameter openings for wiring, and the supplied Shimano groms are too small.

You could send it back like a dick, or just get some campy or generic plugs that will fit the frame properly, fit the cable properly, and start riding the thing.

Why?

Di2 standard was released to frame manufacturers before Campy officially released their stuff, and grommets were made to fit those holes.

Then Campy officially came out with EPS.......

The Campy wire terminals are wider, because they don't give a shit what Shimano does. -So many unknowing folks who built a bike with the brand new EPS and an (electronic ready) frameset found out that these frames were built for the Di2 standard, and subsequently had to drill the frames out or get upset about how multi-thousand dollar bike frames and parts sometimes don't go together like legos..

Now, most manufacturers are widening holes on upper-end whips for EPS, and the standard Shimano style plugs are too small for larger Omni-electronic friendly frames..

I'm not trying to be a naughty cock here, but I have heard this over and over in the last few years, and it is just an issue of Campagnolo making things difficult. -So now frames can have have bigger holes, and we can be supplied with grommets that are too small.

Drill with little pressure. I used a carbide bite. A cheaper bit could be used but it will not last as long. Smaller drill size than what you need. Use a small stone or carbide grinder bit to grind the hole to the final size. I did mine and had no problems.

Butcher wrote:Drill with little pressure. I used a carbide bite. A cheaper bit could be used but it will not last as long. Smaller drill size than what you need. Use a small stone or carbide grinder bit to grind the hole to the final size. I did mine and had no problems.